Guys I know what the problem(if you deem it a problem) is. It's something I've noticed my entire adult life. Combo of two things: 1. you yourself are not skinny and likely taller. 2. you are genereally a nice guy making eye contact and returning a smile to most people, including strangers.

number 2 is the kicker. bigger girls see that as flirting. think of big girls like most GUYS. they are retardedly optimistic. your innocent smile back her way across the bar was in invite to pound her poon all night long. there, problem/luxury solved.